Under flow sluice ?

Rebel73153 said:
GG, you ever think about build some of them to sell? And yea, the Under Flow is different than the Bazooka. I am thinking now that seeing the Bazooka type in action that it may be better for the small flour gold we have around here? Right now i am working on a standard sluice build. Just bought a sheet of 5052 .063 aluminum and had the side bent up on it. Now to put in some ribbed ribber matting and find someone to build a back angle riffle bar set up for it like Figure 11 in this Sluice building file. Start with (2) 3/4" high riffles then (2) 5/8" and then (2) 1/2" and finally (2) 3/8" to maintain the water flow as stated in the file. What you think? Feasible?
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Yep the decreasing height riffles in order to maintain flow speed makes a lot of sense. Or else have a sluice that starts off wider and tapers narrower toward the exit, then all riffles could remain the same height and achieve the same results I suppose.

GG~
 

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Rebel73153 said:
Well good diggin'.
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Same to you... and that L2 riffle design that you want is what I use over black vortex mat and I think it's the ultimate setup.
Just remember the formula of "twice the overall riffle height = spacing between riffles" so as you drop down in height you also must space them closer together accordingly.

GG~
 

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Glad to hear that they work. Now to find someone to build a set at an affordable price. Do you use them directly over the mat or do you use moss with them too? I was thinking about trying a set right on the bare bottom of the sluice to see how they worked and if that didn't work out adding some Semi-Deep ribbed matting under them?
 

Rebel73153 said:
Glad to hear that they work. Now to find someone to build a set at an affordable price. Do you use them directly over the mat or do you use moss with them too? I was thinking about trying a set right on the bare bottom of the sluice to see how they worked and if that didn't work out adding some Semi-Deep ribbed matting under them?
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I use them directly over the vortex mat (rough top conveyer belt) , no need for anything else. I like the black vortex mat because the distance between the ridges are 1/4" insuring capability of locking in 1/4" nuggets and smaller although I doubt nuggets of any size could ever make it up and over the 1" tall riffles that I use.
 

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Thanks again. I may have to check out that Vortex matting. Never tried it before. Something else to Play with.
 

GG, do you use any of the plastic Drop Riffle sluices? If so, what's your view on them as fine flour gold getters?
 

NeoTokyo said:
I have bought a little thing of Jet-Dry since that video. :)

Rebel;

The Bazooka is better in that you do not have to classify first.
The Bazooka is worse in that you lose any nuggets over 1/2" in size.
The Bazooka is better in how quick the initial cleanup is.
The Bazooka is worse in how long the following cleanup of the cons takes.

The Bazooka also needs more water flow.

Chip (Miners Cache owner here in Redding) had a friend of his use it with a regular sluice behind it, his friend isnt back with the results yet but he will let me know how it did when he gets back.

In the long run of things, the Bazooka is quicker but you lose larger nuggets and specimens that a normal sluice would catch.

From what I hear they are working on a nugget catcher attachment though.
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After the war dept. gets over my gold cube and blue bowl requisition . The miners bazooka is what I will get. Here in Washington state I do not have to worry about losing large nuggets. But the fine gold is every where.
 

I dont think you can go wrong with the Bazooka in that case. :)
 

Rebel73153 said:
GG, do you use any of the plastic Drop Riffle sluices? If so, what's your view on them as fine flour gold getters?
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I've heard they work on flour gold and I've also heard they don't :dontknow:
The only one I have tried is one that I made myself and it was way too wide (14") for the water flow that was available the day I tested it out.

I have made another narrower version (10") but I haven't had the chance to test it out yet. I'm sure they will catch fine and flour gold if the water speed is right and if they're fed properly classified material.

The thing is.... I'm so happy with the way my fluid bed sluice catches the flour gold and doesn't require any classifying that I rarely use anything else as a stream sluice.

GG~
 

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Thanks for the input. I am seriously thinking more about one of the Bazooka Gold Traps. That is unless you are going to start making and selling yours? :icon_scratch:
 

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Most of the gold I find is sitting directly below my punch plate. I actually made the punch by drilling all the holes. A pre made piece would sure be faster. What is nice about this design is when you have your water flow correct there is no classifying below potato sized rocks. I even found a nugget, and it was caught in the first riffle after the punch plate ends. If you would prefer to buy one look up the Calsluice. My home made box:http://www.treasurenet.com/forums/sluicing/241741-my-fine-gold-sluice.html Calsluice:. One cool tid bit showed for a split second on the calsluice vid is a sluice viewer which can be made out of most any clear plastic.It allows you to look under the water ripples like goggles. In fact goggles work too =)
 

Jack Hamilton said:
Most of the gold I find is sitting directly below my punch plate. I actually made the punch by drilling all the holes. A pre made piece would sure be faster. What is nice about this design is when you have your water flow correct there is no classifying below potato sized rocks. I even found a nugget, and it was caught in the first riffle after the punch plate ends. If you would prefer to buy one look up the Calsluice. My home made box:http://www.treasurenet.com/forums/sluicing/241741-my-fine-gold-sluice.html One cool tid bit showed for a split second on the calsluice vid is a sluice viewer which can be made out of most any clear plastic.It allows you to look under the water ripples like goggles. In fact goggles work too =)
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Thanks Jack!

The one I built similar to that lost a bit of flour gold during testing and I ended up using the punch plate on another project.
I like the concept though, so maybe I'll go back to the drawing board and see if I can correct the problem. :icon_scratch:

Could have been that I used a shallow v groove mat instead of deep groove. Maybe this time I'll use the vortex (conveyor) mat instead.

GG~
 

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Take a look at Keene's fast water riffles. They are a bit taller and designed for dredges. When you get into the under-over style sluice some modifications should command some attention. I run my sluice several ways, and it depends on the water flow, time of year etc. When the river runs fast I run tall riffles and my punch plate. I feed my sluice with a shovel. I don't classify at all. In the middle of summer when the river is weak, I classify and use a little garden shovel to feed my box out of classified buckets. Just depends on the water flow =)
 

Jack Hamilton said:
Take a look at Keene's fast water riffles. They are a bit taller and designed for dredges. When you get into the under-over style sluice some modifications should command some attention. I run my sluice several ways, and it depends on the water flow, time of year etc. When the river runs fast I run tall riffles and my punch plate. I feed my sluice with a shovel. I don't classify at all. In the middle of summer when the river is weak, I classify and use a little garden shovel to feed my box out of classified buckets. Just depends on the water flow =)
Click to expand...

I agree ... water flow dictates the method :icon_thumleft:
 

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